CH136255A - Process for the preparation of an o-oxyazo dye. - Google Patents
Process for the preparation of an o-oxyazo dye.Info
- Publication number
- CH136255A CH136255A CH136255DA CH136255A CH 136255 A CH136255 A CH 136255A CH 136255D A CH136255D A CH 136255DA CH 136255 A CH136255 A CH 136255A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- oxyazo
- preparation
- acid
- proof
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines o-Oxyazofarbstoffes. Es wurde gefunden, dass man neue o- Oxyazofarbstoffe erhält, die wertvolle, durch ihr Egalisierungsvermögen ausgezeichnete Beizenfa.rbstoffe von vorzüglichen Echtheits eigenschaften sind, wenn man o-Oxydiazo- verbindungen mit 2. 8 - Dioxynaphthalin - 6. carbonsäure, zweckmässig in alkalischer Lö sung, kuppelt.
Die bisher unbekannte 2- 8 - Dioxynaph- thalin-6-carbonsäure erhält man durch Sul- fieren der 2 . 6 - Naphtholcarbonsäure und Alkalischmelze der so erhaltenen 2-Naplithol- 8-su@lfo-6-ca,rbonsäure.
Vorliegendes Patent bezieht sich nun auf die Darstellung eines o-Oxyazofarbstoffes durch Kombination von dianotierter Pikramin- säure mit 2. 8 - Dioxynaphthalin - 6 - carbon- säure.
Trocken ist der Farbstoff ein schwärz liches Pulver. löslich in konzentrierter Schwefelsäure mit bläulich roter Farbe; er färbt Wolle in sehr gleichmässigen violettbraunen Tönen; durch Nachchromieren erhält man ein walk- und pottingechtes Schwarzgrün.
<I>Beispiel:</I> Man dianotiert 19,9 Teile Pikraminsäure in die üblichen Weise und gibt die Diazo- er lung zu einer sodaalkalischen Lösung v 'binc von 21 Teilen 2'. 8-Dioxynaphtha-Iin-6-car- bons!äure hinzu. Der Farbstoff wird nach be endeter Kupplung ausgesalzen und in übli cher -Weise aufgearbeitet.
Process for the preparation of an o-oxyazo dye. It has been found that new o-oxyazo dyes are obtained which are valuable Beizenfa.rbstoffe, which are excellent due to their leveling capacity, of excellent fastness properties, if one o-oxydiazo compounds with 2. 8 - dioxynaphthalene - 6. carboxylic acid, suitably in alkaline Lö sung, clutch.
The hitherto unknown 2-8-dioxynaphthalene-6-carboxylic acid is obtained by sulfating the 2. 6 - Naphtholcarboxylic acid and alkali melt of the 2-naplithol-8-su @ lfo-6-ca, rboxylic acid thus obtained.
The present patent now relates to the preparation of an o-oxyazo dye by combining dianotated picric acid with 2,8-dioxynaphthalene-6-carboxylic acid.
When dry, the dye is a blackish powder. soluble in concentrated sulfuric acid with a bluish red color; he dyes wool in very even purple-brown tones; by re-chrome plating, a black-green color that is true to walk and potting is obtained.
<I> Example: </I> 19.9 parts of picric acid are dianotated in the usual way and the diazoic acid is added to a soda-alkaline solution v'binc of 21 parts 2 '. 8-Dioxynaphtha-Iin-6-carboxylic acid added. After the coupling has ended, the dye is salted out and worked up in the usual manner.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE136255X | 1926-10-05 | ||
CH130158T | 1927-09-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH136255A true CH136255A (en) | 1929-10-31 |
Family
ID=25711382
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH136255D CH136255A (en) | 1926-10-05 | 1927-09-29 | Process for the preparation of an o-oxyazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH136255A (en) |
-
1927
- 1927-09-29 CH CH136255D patent/CH136255A/en unknown
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CH250818A (en) | Process for the preparation of a new copper-compatible polyazo dye. | |
CH136255A (en) | Process for the preparation of an o-oxyazo dye. | |
CH136254A (en) | Process for the preparation of an o-oxyazo dye. | |
CH130158A (en) | Process for the preparation of an o-oxyazo dye. | |
CH136253A (en) | Process for the preparation of an o-oxyazo dye. | |
CH111496A (en) | Process for the preparation of a monoazo dye. | |
CH222693A (en) | Process for the preparation of a monoazo dye. | |
CH133694A (en) | Process for the preparation of an azo dye. | |
CH133693A (en) | Process for the preparation of an azo dye. | |
CH134102A (en) | Process for the preparation of an azo dye. | |
CH129001A (en) | Process for the preparation of an azo dye. | |
CH220217A (en) | Process for the production of a new azo dye. | |
CH200063A (en) | Process for the preparation of an azo dye. | |
CH111495A (en) | Process for the preparation of a monoazo dye. | |
CH191165A (en) | Process for the preparation of a new monoazo dye. | |
CH155453A (en) | Process for the preparation of a new monoazo dye. | |
CH139375A (en) | Process for the preparation of a polyazo dye. | |
CH191160A (en) | Process for the preparation of a new monoazo dye. | |
CH117270A (en) | Process for the production of a new dye. | |
CH133695A (en) | Process for the preparation of an azo dye. | |
CH200370A (en) | Process for the preparation of a chromable o-oxydisazo dye. | |
CH222692A (en) | Process for the preparation of a monoazo dye. | |
CH129481A (en) | Process for the production of a new azo dye. | |
CH210732A (en) | Process for the preparation of a new water-soluble disazo dye. | |
CH115462A (en) | Process for the production of a new azo dye. |